Tuesday, July 16, 2019
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, JULY 16, 2019
ALL TIMES ARE IN EASTERN STANDARD TIME
A LITTLE ABOVE SEASONABLE WITH WIND INCREASING
IN THE AFTERNOON….
A feeble wind this morning increased to 12 mph on average
this afternoon, with a max gust so far of 22 mph. Visibility
was limited to 70 miles at most, due to a distant haze.
Today remained dry, with an afternoon humidity around 40%.
The high so far today is 85F, 4 degrees above the daily normal
maximum of 81F. The low since midnight is 65F, 2 degrees above
the average minimum of 63F.
PRELIMINARY STATS FOR JUNE 2019
TEMPERATURE, Deg. F
Avg. Max. 75.1 [+0.1]
Avg. Min. 57.3 [+0.2]
Mean 66.2 [+0.1]
24-hour corrected mean: 66.0
Max. for month: 88F on the 28th
Min. for month: 45F on the 4th
COOLING DEGREE DAYS
Total cooling units: 81 [-24]
Total for the season: 89 [-40]
Total for last season: 159
HEATING DEGREE DAYS
Total cooling units: 36 [-37]
Total for the season: 6254 [-122]
Total for last season: 5916
PRECIPITATION, Inches
Total: 4.08 [-0.23]
Greatest in 24 hrs: 1.30 ins. on the 10th-11th
WIND, mph
Avg. uncorrected wind speed: 9.9
Avg. corrected wind speed: 10.5
Prevailing wind direction: S at 17%
Peak gust and direction: 41 W on 3rd
SUNSHINE:
Campbell-Stokes card minutes: 14118 minutes of possible 26376 or 54%
Astronomical total minutes: 14674 minutes of possible 27416 or 54%
Today’s Observations:
7 A.M.
Weather: Broken cirrostratus
Temperature: 71F; Dew Point: 58F; Wind: NNW at 3 kts,
Wind: Light and variable
Sea-level pressure: 30.09 ins. Hg, falling then rising
Visibility: 70 miles, thin smoke layer
6-hr Max temp: 71F
6-hr Min temp: 65F
24-hr Precip: 0.00 ins.
BHO SA 1155 E250 BKN 70 189/71/58/3403/009/ THN K LYR
ALQDS WND L/V/ 8/008 51010 10071 20065
10 A.M.
Weather: Broken cirrostratus
Temperature: 79F; Dew Point: 59F; Wind: SW at 6 kts,
Wind: Light
Sea-level pressure: 30.07 ins. Hg, falling steadily
Visibility: 70 miles, distant haze
3-hr Precip: 0.00 ins.
BHO SA 1455 E250 BKN 70 184/79/59/2306/007/ DSNT HZ ALQDS
WND LGT/ 8/008 58005
1 P.M.
Weather: Scattered altocumulus, broken cirrostratus
Temperature: 85F; Dew Point: 59F; Wind: WSW at 8G16 kts
Sea-level pressure: 30.03 ins. Hg, falling, then more quickly
Visibility: 60 miles, distant haze
6-hr Max temp: 85F
6-hr Min temp: 71F
6-hr Precip: 0.00 ins.
BHO SA 1755 120 SCT E250 BKN 60 171/85/59/2508G16/003/ DSNT HZ
ALQDS/ 8/078 58013 10085 20071
SUMMARY FOR MONDAY, JULY 15, 2019
TEMPERATURE (DEGREES F)
MAX…..82 NORMAL…..81
MIN…..63 NORMAL…..63
MEAN….73 NORMAL…..72
DEPARTURE FROM 30-YEAR NORMAL………………….+1
TOTAL DEPARTURE FOR THE MONTH…………………+57 [+3.6 DEGREES/DAY]
COOLING DEGREE DAYS (SEASON JAN TO DEC)
TOTAL COOLING UNITS FOR YESTERDAY……………8 DEPARTURE………+1
TOTAL COOLING UNITS FOR THE MONTH………….153 DEPARTURE……..+53
TOTAL COOLING UNITS FOR THE SEASON…………242 DEPARTURE……..+13
TOTAL COOLING UNITS LAST SEASON TO DATE…….302 DEPARTURE……..-60
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………..24 WNW AT 4:08 P.M.
AERO…………………….21 W AT 12:27 P.M.
ASOS…………………….23 W AT 12:25 P.M.
DAVIS……………………23 W AT 12:25 P.M. RMY 22
FASTEST MILE FOR YESTERDAY………………….16 WNW AT 4:22 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………….16 W AT 4:20 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE………………17 W AT 4:20 P.M.
AVERAGE WIND SPEED AND DIRECTION…………….9.4 NW
ASOS…………………….9.7
DAVIS……………………9.9 WNW [304 deg.]
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00 DEPARTURE……-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.45 DEPARTURE……-0.36
ASOS…………..1.45
TOTAL PRECIPITATION FOR THE YEAR……….31.32 DEPARTURE……+2.54
ASOS………….31.22
PRELIMINARY CLIMATE SUMMARY FOR JUNE CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
06/01 71/54/63/+1/0.00/551/61 21 E AERO 20 E RMY 18
06/02 75/51/63/+1/0.02/417/46 23 S AERO 21 S RMY N/A
06/03 69/50/60/-2/0.02/753/83 41 W AERO 39 W RMY 43
06/04 70/45/58/-5/0.00/717/79 29 W AERO 23 W RMY N/A
06/05 81/57/69/+6/0.03/527/58 33 SSW AERO 33 SSW RMY N/A
06/06 75/64/70/+6/0.06/428/47 28 SSW AERO 28 SSW RMY N/A
06/07 80/59/70/+6/0.00/692/76 23 S AERO 23 S RMY 22
06/08 78/57/68/+4/0.00/885/97 23 ENE AERO 21 SW RMY 21
06/09 78/55/67/+3/0.00/840/93 22 S AERO 21 S RMY 21
06/10 79/54/67/+2/0.29/712/78 26 SSE AERO 25 SSE RMY 33
06/11 73/58/66/+1/1.03/247/27 32 NW AERO 30 NW RMY 35
06/12 75/52/64/-1/0.00/869/95 25 SSW AERO 25 S RMY 28
06/13 55/49/52/-13/0.81/000/00 36 NE AERO 35 NE RMY 35
06/14 72/50/61/-5/0.00/540/59 38 W AERO 39 W RMY 38
06/15 79/54/67/+1/0.00/879/96 38 SSW AERO 41 SSW RMY 40
06/16 70/62/66/0/0.13/000/00 32 SW AERO 35 SW RMY N/A
06/17 74/62/68/+1/0.00/348/38 12 SSE AERO 18 NW RMY 17
06/18 71/62/67/0/0.10/000/00 17*S AERO 17 S RMY 16
06/19 74/61/68/+1/0.00/101/11 16 SSE AERO 20 SSE RMY 19
06/20 69/61/65/-3/0.26/000/00 26 S AERO 26 S RMY 29
06/21 68/58/63/-5/0.75/018/02 32 NW AERO 28 NW RMY 33
06/22 77/56/67/-1/T/779/85 33 NW AERO 32 NW RMY 35
06/23 82/59/71/+3/0.00/871/95 30 NW AERO 25 WNW RMY 29
06/24 84/61/73/+4/0.00/779/85 22 NW AERO 21 NW RMY 22
06/25 73/61/67/-2/0.18/083/09 35 S AERO 37 S RMY 37
06/26 77/64/71/+2/0.00/559/61 12 ENE AERO 18 SE RMY N/A
06/27 81/57/69/0/0.00/614/67 21 NE AERO 18 NE RMY N/A
06/28 88/64/76/+6/0.00/870/95 16 SW AERO 18 SW RMY N/A
06/29 80/66/73/+3/0.29/165/18 25 W AERO 25 W RMY 26
06/30 75/59/67/-3/0.13/430/47 31 N AERO 30 N RMY 35
*Estimated
PRELIMINARY CLIMATE SUMMARY FOR JULY CALENDAR DAY DATA
DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/PEAK GUST/AERO/RMY GUST
AERO: Aerovane wind recording system gust
RMY: R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized
M: Missing data
07/01 83/58/71/+1/0.00/…/.. 21 NNW AERO 21 NNW RMY N/A
07/02 82/65/74/+4/0.00/…/.. 23 W AERO 23 W RMY 23
07/03 89/67/78/+7/0.00/…/.. 18 S AERO 18 S RMY 18
07/04 88/68/78/+7/0.00/…/.. 17 SSW AERO M M RMY 17
07/05 87/69/78/+7/0.00/…/.. 21 SW AERO M M RMY 21
07/06 90/71/81/+10/0.83/…/.. 26 WNW AERO M M RMY N/A
07/07 78/64/71/0/0.00/…/.. 30 NE AERO M M RMY N/A
07/08 79/59/69/-3/0.00/…/.. 16 N AERO 18 SSW RMY N/A
07/09 85/61/73/+1/0.00/…/.. 18 NW AERO 16 NW RMY 18
07/10 88/69/79/+7/0.00/…/.. 20 ESE AERO 16 ESE RMY 17
07/11 81/67/74/+2/0.62/…/.. 35 S AERO 33 S RMY 36
07/12 84/68/76/+4/0.00/…/.. 31 WNW AERO 30 WNW RMY 32
07/13 85/65/75/+3/0.00/…/.. 21 W AERO 20 WSW RMY 20
07/14 87/68/78/+6/0.00/…/.. 25 W AERO 21 W RMY 23
07/15 82/63/73/+1/0.00/…/.. 24 WNW AERO 23 WNW RMY 22
07/16 Low temp since midnight is 65F; normal low is 63F
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR JULY 16
HIGH 94F IN 1968, 1980, 1983, 1999
LOW 50F IN 1889, 1903
PRECIP 0.97 INS IN 2014
WIND 48e MPH SW 1944
RECORDS FOR JULY 17
HIGH 96F IN 1999
LOW 47F IN 1892
PRECIP 1.39 INS IN 1989
WIND 46 MPH WNW IN 1971
TODAY’S REPORT PREPARED BY: Benjamin Turner
